Excluded failing tests show as passed when all tests are run

[sfsccn]

If I exclude a group in phpunit.xml as shown below, tests tagged with this group are marked as passed in the test explorer when I click the "Run all tests" button ("play" icon), including tests that are supposed to fail. If I run such tests individually, they correctly show as failed. If the groups section is removed from phpunit.xml then "Run all" correctly shows those tests as failing, so the extension appears to be using phpunit.xml.

    <groups>
        <exclude>
            <group>fails</group>
        </exclude>
    </groups> 

• Extension verison: 2.0.72
• VS Code: 1.45.1
• PHPUnit: 9.1.4
• OS: Ubuntu Server 20.04